00:01
This question simply asks you to identify the following four reactions.
00:05
If it is an oxidation reduction reaction or a redox reaction, then identify what is being oxidized and what is being reduced.
00:14
The first reaction is zinc metal with cobalt chloride producing zinc chloride and cobalt metal.
00:20
This is a redox reaction because we see zinc with an oxidation state of zero becoming zinc 2 plus with an oxidation state of 2 plus.
00:31
Cobalt with a 2 plus charge, 2 plus oxidation state, goes to cobalt metal with an oxidation state of zero.
00:38
So zinc, showing an increase in its oxidation state, is oxidized, and the cobalt chloride, showing a decrease in oxidation state of the chloride, is reduced.
00:50
The next reaction is hi reacting with n .a .o .h is an acid.
00:54
N .o .h is a base...